2 * csr1212.h -- IEEE 1212 Control and Status Register support for Linux
4 * Copyright (C) 2003 Francois Retief <fgretief@sun.ac.za>
5 * Steve Kinneberg <kinnebergsteve@acmsystems.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
19 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
21 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 /* Compatibility layer */
37 #include <linux/types.h>
38 #include <linux/slab.h>
39 #include <linux/interrupt.h>
40 #include <linux/vmalloc.h>
41 #include <asm/pgalloc.h>
43 #define CSR1212_MALLOC(size) vmalloc((size))
44 #define CSR1212_FREE(ptr) vfree(ptr)
45 #define CSR1212_BE16_TO_CPU(quad) be16_to_cpu(quad)
46 #define CSR1212_CPU_TO_BE16(quad) cpu_to_be16(quad)
47 #define CSR1212_BE32_TO_CPU(quad) be32_to_cpu(quad)
48 #define CSR1212_CPU_TO_BE32(quad) cpu_to_be32(quad)
49 #define CSR1212_BE64_TO_CPU(quad) be64_to_cpu(quad)
50 #define CSR1212_CPU_TO_BE64(quad) cpu_to_be64(quad)
52 #define CSR1212_LE16_TO_CPU(quad) le16_to_cpu(quad)
53 #define CSR1212_CPU_TO_LE16(quad) cpu_to_le16(quad)
54 #define CSR1212_LE32_TO_CPU(quad) le32_to_cpu(quad)
55 #define CSR1212_CPU_TO_LE32(quad) cpu_to_le32(quad)
56 #define CSR1212_LE64_TO_CPU(quad) le64_to_cpu(quad)
57 #define CSR1212_CPU_TO_LE64(quad) cpu_to_le64(quad)
59 #include <linux/errno.h>
60 #define CSR1212_SUCCESS (0)
61 #define CSR1212_EINVAL (-EINVAL)
62 #define CSR1212_ENOMEM (-ENOMEM)
63 #define CSR1212_ENOENT (-ENOENT)
64 #define CSR1212_EIO (-EIO)
65 #define CSR1212_EBUSY (-EBUSY)
69 #include <sys/types.h>
71 #define CSR1212_MALLOC(size) malloc(size)
72 #define CSR1212_FREE(ptr) free(ptr)
74 #if __BYTE_ORDER == __LITTLE_ENDIAN
76 #define CSR1212_BE16_TO_CPU(quad) bswap_16(quad)
77 #define CSR1212_CPU_TO_BE16(quad) bswap_16(quad)
78 #define CSR1212_BE32_TO_CPU(quad) bswap_32(quad)
79 #define CSR1212_CPU_TO_BE32(quad) bswap_32(quad)
80 #define CSR1212_BE64_TO_CPU(quad) bswap_64(quad)
81 #define CSR1212_CPU_TO_BE64(quad) bswap_64(quad)
83 #define CSR1212_LE16_TO_CPU(quad) (quad)
84 #define CSR1212_CPU_TO_LE16(quad) (quad)
85 #define CSR1212_LE32_TO_CPU(quad) (quad)
86 #define CSR1212_CPU_TO_LE32(quad) (quad)
87 #define CSR1212_LE64_TO_CPU(quad) (quad)
88 #define CSR1212_CPU_TO_LE64(quad) (quad)
90 #define CSR1212_BE16_TO_CPU(quad) (quad)
91 #define CSR1212_CPU_TO_BE16(quad) (quad)
92 #define CSR1212_BE32_TO_CPU(quad) (quad)
93 #define CSR1212_CPU_TO_BE32(quad) (quad)
94 #define CSR1212_BE64_TO_CPU(quad) (quad)
95 #define CSR1212_CPU_TO_BE64(quad) (quad)
97 #define CSR1212_LE16_TO_CPU(quad) bswap_16(quad)
98 #define CSR1212_CPU_TO_LE16(quad) bswap_16(quad)
99 #define CSR1212_LE32_TO_CPU(quad) bswap_32(quad)
100 #define CSR1212_CPU_TO_LE32(quad) bswap_32(quad)
101 #define CSR1212_LE64_TO_CPU(quad) bswap_64(quad)
102 #define CSR1212_CPU_TO_LE64(quad) bswap_64(quad)
106 #define CSR1212_SUCCESS (0)
107 #define CSR1212_EINVAL (EINVAL)
108 #define CSR1212_ENOMEM (ENOMEM)
109 #define CSR1212_ENOENT (ENOENT)
110 #define CSR1212_EIO (EIO)
111 #define CSR1212_EBUSY (EBUSY)
116 /* CSR 1212 key types */
117 #define CSR1212_KV_TYPE_IMMEDIATE 0
118 #define CSR1212_KV_TYPE_CSR_OFFSET 1
119 #define CSR1212_KV_TYPE_LEAF 2
120 #define CSR1212_KV_TYPE_DIRECTORY 3
123 /* CSR 1212 key ids */
124 #define CSR1212_KV_ID_DESCRIPTOR 0x01
125 #define CSR1212_KV_ID_BUS_DEPENDENT_INFO 0x02
126 #define CSR1212_KV_ID_VENDOR 0x03
127 #define CSR1212_KV_ID_HARDWARE_VERSION 0x04
128 #define CSR1212_KV_ID_MODULE 0x07
129 #define CSR1212_KV_ID_NODE_CAPABILITIES 0x0C
130 #define CSR1212_KV_ID_EUI_64 0x0D
131 #define CSR1212_KV_ID_UNIT 0x11
132 #define CSR1212_KV_ID_SPECIFIER_ID 0x12
133 #define CSR1212_KV_ID_VERSION 0x13
134 #define CSR1212_KV_ID_DEPENDENT_INFO 0x14
135 #define CSR1212_KV_ID_UNIT_LOCATION 0x15
136 #define CSR1212_KV_ID_MODEL 0x17
137 #define CSR1212_KV_ID_INSTANCE 0x18
138 #define CSR1212_KV_ID_KEYWORD 0x19
139 #define CSR1212_KV_ID_FEATURE 0x1A
140 #define CSR1212_KV_ID_EXTENDED_ROM 0x1B
141 #define CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID 0x1C
142 #define CSR1212_KV_ID_EXTENDED_KEY 0x1D
143 #define CSR1212_KV_ID_EXTENDED_DATA 0x1E
144 #define CSR1212_KV_ID_MODIFIABLE_DESCRIPTOR 0x1F
145 #define CSR1212_KV_ID_DIRECTORY_ID 0x20
146 #define CSR1212_KV_ID_REVISION 0x21
149 /* IEEE 1212 Address space map */
150 #define CSR1212_ALL_SPACE_BASE (0x000000000000ULL)
151 #define CSR1212_ALL_SPACE_SIZE (1ULL << 48)
152 #define CSR1212_ALL_SPACE_END (CSR1212_ALL_SPACE_BASE + CSR1212_ALL_SPACE_SIZE)
154 #define CSR1212_MEMORY_SPACE_BASE (0x000000000000ULL)
155 #define CSR1212_MEMORY_SPACE_SIZE ((256ULL * (1ULL << 40)) - (512ULL * (1ULL << 20)))
156 #define CSR1212_MEMORY_SPACE_END (CSR1212_MEMORY_SPACE_BASE + CSR1212_MEMORY_SPACE_SIZE)
158 #define CSR1212_PRIVATE_SPACE_BASE (0xffffe0000000ULL)
159 #define CSR1212_PRIVATE_SPACE_SIZE (256ULL * (1ULL << 20))
160 #define CSR1212_PRIVATE_SPACE_END (CSR1212_PRIVATE_SPACE_BASE + CSR1212_PRIVATE_SPACE_SIZE)
162 #define CSR1212_REGISTER_SPACE_BASE (0xfffff0000000ULL)
163 #define CSR1212_REGISTER_SPACE_SIZE (256ULL * (1ULL << 20))
164 #define CSR1212_REGISTER_SPACE_END (CSR1212_REGISTER_SPACE_BASE + CSR1212_REGISTER_SPACE_SIZE)
166 #define CSR1212_CSR_ARCH_REG_SPACE_BASE (0xfffff0000000ULL)
167 #define CSR1212_CSR_ARCH_REG_SPACE_SIZE (512)
168 #define CSR1212_CSR_ARCH_REG_SPACE_END (CSR1212_CSR_ARCH_REG_SPACE_BASE + CSR1212_CSR_ARCH_REG_SPACE_SIZE)
169 #define CSR1212_CSR_ARCH_REG_SPACE_OFFSET (CSR1212_CSR_ARCH_REG_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE)
171 #define CSR1212_CSR_BUS_DEP_REG_SPACE_BASE (0xfffff0000200ULL)
172 #define CSR1212_CSR_BUS_DEP_REG_SPACE_SIZE (512)
173 #define CSR1212_CSR_BUS_DEP_REG_SPACE_END (CSR1212_CSR_BUS_DEP_REG_SPACE_BASE + CSR1212_CSR_BUS_DEP_REG_SPACE_SIZE)
174 #define CSR1212_CSR_BUS_DEP_REG_SPACE_OFFSET (CSR1212_CSR_BUS_DEP_REG_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE)
176 #define CSR1212_CONFIG_ROM_SPACE_BASE (0xfffff0000400ULL)
177 #define CSR1212_CONFIG_ROM_SPACE_SIZE (1024)
178 #define CSR1212_CONFIG_ROM_SPACE_END (CSR1212_CONFIG_ROM_SPACE_BASE + CSR1212_CONFIG_ROM_SPACE_SIZE)
179 #define CSR1212_CONFIG_ROM_SPACE_OFFSET (CSR1212_CONFIG_ROM_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE)
181 #define CSR1212_UNITS_SPACE_BASE (0xfffff0000800ULL)
182 #define CSR1212_UNITS_SPACE_SIZE ((256ULL * (1ULL << 20)) - 2048)
183 #define CSR1212_UNITS_SPACE_END (CSR1212_UNITS_SPACE_BASE + CSR1212_UNITS_SPACE_SIZE)
184 #define CSR1212_UNITS_SPACE_OFFSET (CSR1212_UNITS_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE)
186 #define CSR1212_INVALID_ADDR_SPACE -1
189 /* Config ROM image structures */
190 struct csr1212_bus_info_block_img {
196 u_int32_t data[0]; /* older gcc can't handle [] which is standard */
199 typedef u_int32_t csr1212_quad_t;
201 struct csr1212_leaf {
206 struct csr1212_dentry {
207 struct csr1212_dentry *next, *prev;
208 struct csr1212_keyval *kv;
211 struct csr1212_directory {
213 struct csr1212_dentry *dentries_head, *dentries_tail;
216 struct csr1212_keyval {
223 u_int32_t csr_offset;
224 struct csr1212_leaf leaf;
225 struct csr1212_directory directory;
227 struct csr1212_keyval *associate;
230 /* used in generating and/or parsing CSR image */
231 struct csr1212_keyval *next, *prev; /* flat list of CSR elements */
232 u_int32_t offset; /* position in CSR from 0xffff f000 0000 */
233 u_int8_t valid; /* flag indicating keyval has valid data*/
237 struct csr1212_cache_region {
238 struct csr1212_cache_region *next, *prev;
239 u_int32_t offset_start; /* inclusive */
240 u_int32_t offset_end; /* exclusive */
243 struct csr1212_csr_rom_cache {
244 struct csr1212_csr_rom_cache *next, *prev;
245 struct csr1212_cache_region *filled_head, *filled_tail;
246 struct csr1212_keyval *layout_head, *layout_tail;
249 struct csr1212_keyval *ext_rom;
253 u_int32_t data[0]; /* older gcc can't handle [] which is standard */
257 size_t bus_info_len; /* bus info block length in bytes */
258 size_t crc_len; /* crc length in bytes */
259 u_int32_t *bus_info_data; /* bus info data incl bus name and EUI */
261 void *private; /* private, bus specific data */
262 struct csr1212_bus_ops *ops;
264 struct csr1212_keyval *root_kv;
266 int max_rom; /* max bytes readable in Config ROM region */
268 /* Items below used for image parsing and generation */
269 struct csr1212_csr_rom_cache *cache_head, *cache_tail;
272 struct csr1212_bus_ops {
273 /* This function is used by csr1212 to read additional information
274 * from remote nodes when parsing a Config ROM (i.e., read Config ROM
275 * entries located in the Units Space. Must return 0 on success
276 * anything else indicates an error. */
277 int (*bus_read) (struct csr1212_csr *csr, u_int64_t addr,
278 u_int16_t length, void *buffer, void *private);
280 /* This function is used by csr1212 to allocate a region in units space
281 * in the event that Config ROM entries don't all fit in the predefined
282 * 1K region. The void *private parameter is private member of struct
284 u_int64_t (*allocate_addr_range) (u_int64_t size, u_int32_t alignment,
288 /* This function is used by csr1212 to release a region in units space
289 * that is no longer needed. */
290 void (*release_addr) (u_int64_t addr, void *private);
292 /* This function is used by csr1212 to determine the max read request
293 * supported by a remote node when reading the ConfigROM space. Must
294 * return 0, 1, or 2 per IEEE 1212. */
295 int (*get_max_rom) (u_int32_t *bus_info, void *private);
299 /* Descriptor Leaf manipulation macros */
300 #define CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT 24
301 #define CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID_MASK 0xffffff
302 #define CSR1212_DESCRIPTOR_LEAF_OVERHEAD (1 * sizeof(u_int32_t))
304 #define CSR1212_DESCRIPTOR_LEAF_TYPE(kv) \
305 (CSR1212_BE32_TO_CPU((kv)->value.leaf.data[0]) >> CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT)
306 #define CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) \
307 (CSR1212_BE32_TO_CPU((kv)->value.leaf.data[0]) & \
308 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID_MASK)
311 /* Text Descriptor Leaf manipulation macros */
312 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH_SHIFT 28
313 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH_MASK 0xf /* after shift */
314 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_SHIFT 16
315 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_MASK 0xfff /* after shift */
316 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE_MASK 0xffff
317 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_OVERHEAD (1 * sizeof(u_int32_t))
319 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) \
320 (CSR1212_BE32_TO_CPU((kv)->value.leaf.data[1]) >> \
321 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH_SHIFT)
322 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) \
323 ((CSR1212_BE32_TO_CPU((kv)->value.leaf.data[1]) >> \
324 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_SHIFT) & \
325 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_MASK)
326 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) \
327 (CSR1212_BE32_TO_CPU((kv)->value.leaf.data[1]) & \
328 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE_MASK)
329 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(kv) \
330 (&((kv)->value.leaf.data[2]))
333 /* The following 2 function are for creating new Configuration ROM trees. The
334 * first function is used for both creating local trees and parsing remote
335 * trees. The second function adds pertinent information to local Configuration
336 * ROM trees - namely data for the bus information block. */
337 extern struct csr1212_csr *csr1212_create_csr(struct csr1212_bus_ops *ops,
338 size_t bus_info_size,
340 extern void csr1212_init_local_csr(struct csr1212_csr *csr,
341 const u_int32_t *bus_info_data, int max_rom);
344 /* Destroy a Configuration ROM tree and release all memory taken by the tree. */
345 extern void csr1212_destroy_csr(struct csr1212_csr *csr);
348 /* The following set of functions are fore creating new keyvals for placement in
349 * a Configuration ROM tree. Code that creates new keyvals with these functions
350 * must release those keyvals with csr1212_release_keyval() when they are no
352 extern struct csr1212_keyval *csr1212_new_immediate(u_int8_t key, u_int32_t value);
353 extern struct csr1212_keyval *csr1212_new_directory(u_int8_t key);
354 extern struct csr1212_keyval *csr1212_new_string_descriptor_leaf(const char *s);
357 /* The following function manages association between keyvals. Typically,
358 * Descriptor Leaves and Directories will be associated with another keyval and
359 * it is desirable for the Descriptor keyval to be place immediately after the
360 * keyval that it is associated with.
361 * Take care with subsequent ROM modifications: There is no function to remove
362 * previously specified associations.
364 extern int csr1212_associate_keyval(struct csr1212_keyval *kv,
365 struct csr1212_keyval *associate);
368 /* The following functions manage the association of a keyval and directories.
369 * A keyval may be attached to more than one directory. */
370 extern int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir,
371 struct csr1212_keyval *kv);
372 extern void csr1212_detach_keyval_from_directory(struct csr1212_keyval *dir,
373 struct csr1212_keyval *kv);
376 /* Creates a complete Configuration ROM image in the list of caches available
377 * via csr->cache_head. */
378 extern int csr1212_generate_csr_image(struct csr1212_csr *csr);
381 /* This is a convience function for reading a block of data out of one of the
382 * caches in the csr->cache_head list. */
383 extern int csr1212_read(struct csr1212_csr *csr, u_int32_t offset, void *buffer,
387 /* The following functions are in place for parsing Configuration ROM images.
388 * csr1212_parse_keyval() is used should there be a need to directly parse a
389 * Configuration ROM directly. */
390 extern int csr1212_parse_keyval(struct csr1212_keyval *kv,
391 struct csr1212_csr_rom_cache *cache);
392 extern int csr1212_parse_csr(struct csr1212_csr *csr);
394 /* These are internal functions referenced by inline functions below. */
395 extern int _csr1212_read_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv);
396 extern void _csr1212_destroy_keyval(struct csr1212_keyval *kv);
399 /* This function allocates a new cache which may be used for either parsing or
400 * generating sub-sets of Configuration ROM images. */
401 static inline struct csr1212_csr_rom_cache *csr1212_rom_cache_malloc(u_int32_t offset,
404 struct csr1212_csr_rom_cache *cache;
406 cache = CSR1212_MALLOC(sizeof(*cache) + size);
412 cache->filled_head = NULL;
413 cache->filled_tail = NULL;
414 cache->layout_head = NULL;
415 cache->layout_tail = NULL;
416 cache->offset = offset;
418 cache->ext_rom = NULL;
424 /* This function ensures that a keyval contains data when referencing a keyval
425 * created by parsing a Configuration ROM. */
426 static inline struct csr1212_keyval *csr1212_get_keyval(struct csr1212_csr *csr,
427 struct csr1212_keyval *kv)
432 if (_csr1212_read_keyval(csr, kv) != CSR1212_SUCCESS)
438 /* This function increments the reference count for a keyval should there be a
439 * need for code to retain a keyval that has been parsed. */
440 static inline void csr1212_keep_keyval(struct csr1212_keyval *kv)
446 /* This function decrements a keyval's reference count and will destroy the
447 * keyval when there are no more users of the keyval. This should be called by
448 * any code that calls csr1212_keep_keyval() or any of the keyval creation
449 * routines csr1212_new_*(). */
450 static inline void csr1212_release_keyval(struct csr1212_keyval *kv)
455 _csr1212_destroy_keyval(kv);
460 * This macro allows for looping over the keyval entries in a directory and it
461 * ensures that keyvals from remote ConfigROMs are parsed properly.
463 * _csr is a struct csr1212_csr * that points to CSR associated with dir.
464 * _kv is a struct csr1212_keyval * that'll point to the current keyval (loop index).
465 * _dir is a struct csr1212_keyval * that points to the directory to be looped.
466 * _pos is a struct csr1212_dentry * that is used internally for indexing.
468 * kv will be NULL upon exit of the loop.
470 #define csr1212_for_each_dir_entry(_csr, _kv, _dir, _pos) \
471 for (csr1212_get_keyval((_csr), (_dir)), \
472 _pos = (_dir)->value.directory.dentries_head, \
473 _kv = (_pos) ? csr1212_get_keyval((_csr), _pos->kv) : NULL; \
475 (_kv->associate == NULL) ? \
476 ((_pos = _pos->next), \
477 (_kv = (_pos) ? csr1212_get_keyval((_csr), _pos->kv) : \
479 (_kv = csr1212_get_keyval((_csr), _kv->associate)))
483 #endif /* __CSR1212_H__ */